Daikin RWEYQ8T9Y1B Installer And User Manual

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6 InstallationInstaller and user reference guide31RWEYQ8~14T9V1B + RWEYQ8~14T9Y1BVRV IV water-cooled system air conditioner4P452191-1 – 2017.046.8 Connecting the water piping6.8.1 About connecting the water pipingBefore connecting the water pipingMake sure the outdoor and indoor units are mounted.Typical workflowConnecting the water piping typically consists of the followingstages:1 Connecting the water piping of the outdoor unit.2 Filling the water circuit.3 Insulating the water piping.6.8.2 Precautions when connecting the waterpipingINFORMATIONAlso read the precautions and requirements in thefollowing chapters:▪ General safety precautions▪ Preparation6.8.3 To connect the water pipingaba Cooling water outletb Cooling water inletConsult "5.4.2 Water circuit requirements" on page 19 for the correcttightening torque of the water piping connections.6.8.4 To fill the water circuit1 Connect the water supply hose to the fill valve (field supply).2 Open the fill valve.3 Run the pump ONLY and make sure that no air has beencaught in the water circulation system otherwise the plate heatexchanger will freeze.4 Check if the water flow rate is correct, otherwise the plate heatexchanger will freeze. Measure any water pressure loss beforeand after running the pump and make sure that the flow rate iscorrect. If not, stop the pump immediately and carry outtroubleshooting.6.8.5 To insulate the water pipingThe outdoor water piping MUST be insulated to preventcondensation during cooling operation and reduction of the heatingand cooling capacity.See "5.4.2 Water circuit requirements" on page 19 for moreinformation.6.9 Connecting the electrical wiring6.9.1 Precautions when connecting electricalwiringDANGER: RISK OF ELECTROCUTIONWARNINGAll field wiring and components must be installed by alicensed electrician and must comply with the applicablelegislation.WARNINGIf NOT factory installed, a main switch or other means fordisconnection, having a contact separation in all polesproviding full disconnection under overvoltage category IIIcondition, MUST be installed in the fixed wiring.WARNING▪ ONLY use copper wires.▪ Make sure the field wiring complies with the applicablelegislation.▪ All field wiring must be performed in accordance withthe wiring diagram supplied with the product.▪ NEVER squeeze bundled cables and make sure theydo not come in contact with the piping and sharpedges. Make sure no external pressure is applied to theterminal connections.▪ Make sure to install earth wiring. Do NOT earth the unitto a utility pipe, surge absorber, or telephone earth.Incomplete earth may cause electrical shock.▪ Make sure to use a dedicated power circuit. NEVERuse a power supply shared by another appliance.▪ Make sure to install the required fuses or circuitbreakers.▪ Make sure to install an earth leakage protector. Failureto do so may cause electric shock or fire.▪ When installing the earth leakage protector, make sureit is compatible with the inverter (resistant to highfrequency electric noise) to avoid unnecessary openingof the earth leakage protector.Install power cables at least 1 m away from televisions or radios toprevent interference. Depending on the radio waves, a distance of1 m may not be sufficient.WARNING▪ After finishing the electrical work, confirm that eachelectrical component and terminal inside the electricalcomponents box is connected securely.▪ Make sure all covers are closed before starting up theunit.NOTICEDo NOT operate the unit until the refrigerant piping iscomplete. Running the unit before the piping is ready willbreak the compressor.NOTICEIf the power supply has a missing or wrong N-phase,equipment will break down.